Discounts that stack now

Before this, a shopper who bought a Fixed Bundle or a Build-a-Box plan and then entered an order-level discount code at checkout only got one of the two discounts, Shopify's standard behavior for automatic discounts, and merchants had no way to change that from Subi.

The Fixed Bundle and Build-a-Box create and edit pages now carry a Combinations card with an Order discounts toggle. Turning it on lets the plan's own automatic discount combine with order codes, matching how Shopify already lets you combine product and shipping discounts; turning it off keeps the previous one-discount behavior. The setting saves after your plan save, and only when you've actually changed it.

This is off by default on every plan until you turn it on, so nothing changes for a bundle or box you already have running unless you opt in.